Metal-melting furnace



( No Model.)

1 G. M. BRYANT.

METAL `MELTINGr PURNAGE.

Nm 282,265.. PatemedfJu-ly 31. 1883.. A

4 Tl 7 7! masses 9 UNITED, STATES GEORGE M. BRYANT, OE MINNEAPOLIS, MINNESOTA.

lPATENT OFFICE.

M ETAL-MELTING FURNACE.

SPECIFICATINorming part of Letters Patent No. 282,265, dated July 31,

Application filed August f1, 1882.. (No model.)

I I I This invention relatesto `metal-melting furnaces; and it consists in the construction and arrangement of parts' substantially as herein after, specifically described and claimed.

I Figure 1 isa longitudinal sectional view. Fig. 2 is a semi-sectional plan view, the lower half in section on `the line x x of Fig. 1 and the upper half an outside View.` Fig. 3 is a semi-sectional endview, the right-hand half Ibeing a section on the line 1/ y of Fig. l, andv the left-hand half being an outside view from the front end. Y

A is the outer casing or frame, having a rebricld or other hre-proof lining, B, and is oonstructedwith` a furnace or melting-chamber, C, hopper D, forV supplying the metal to be melted, a coal or other fuel feed hopper, E, a large gathering-reservoir, F, for the melted I metal, and a smaller slag-gathering trough or chamber, G, and smoke-stack H, all arranged sof Iand constructed as shown. I

`TheIcoal-hopper E is situated above the front part of the .meltingchamben and the hopper for supplyingl the metal to be melted is situ- I ated above the rear part of the same chamber, while the gathering-'reservoir F is below the level ofthe meltingchamber, with a narrow throat, a, connecting them.

The rear side of the curved reservoirF- at I does vnot rise quite as high up as the front side at a, so that the slag, as it rises up to the surface of the melted metal, will run over the edge b'into the slag-chamber G, and not back `into the melting-chamber C. The melting- `chamber C is provided with a drop-door, K, in its bottom, by which it may be cleaned out after use, and the reservoir F is also provided with alarge door orr man-hole, L, in its side, through which itsinterior may be reachedfor repairs'or cleaning of obstructions. A small door, M, in the end of the slag-chamber G enables the slag to be removed when the troughis iilled.

The gathering-chamber F may have a curvedtop,"N, if desired, `witha door, P, in its side or top, `through which the melted metal may be dipped up with a ladle 5 or it maybe drawn off in the ordinary manner through a` l-tap hole," d, in the side of the reservoir F.

y Leading from the top ofthe metal-charging hopper D is a pipe, R, connecting the `hopper with the smokestack H, to convey any gases or smoke which may arise to the chimney. Dampers e ci are placed in the pipe R and stack H, toregulate the draft and direction of the smoke, as hereinafter described.v T is the blast-nozzle, opening into the chamber C just below the coal-hopper E, and supplied With a blast ofIIIcold or hot air through a pipe, T2, connected with a suitable blast-creating apparatus. y

T3T1 are two smaller blast-pipes branching from either side of the main blast-pipe T2, and running around outside the casing Ato a point opposite the upper end of the coal-hopper E,

and thence down-to a point opposite thelower part of the melting-chamber C upon either side. At opposite points inthe ends of the coal-hopper E, and also at two points in the ends ofthe lower part of the melting-chamber C and metal-hopper D, small blast-nozzles g are arranged, andconnected to the blast-pipes T T4 by branches T5, and each nozzle provided with a valve, T, by which the blast may be shut Off or admitted at pleasure, as hereinafter described. Dampers lor valves h should be arranged in the pipes T TJ, so that the whole -blast may be turned through the main nozzle in the chamber C by removing the cover m of the coal-hopper, and when a sufficient `amount of burning coa-l is contained in the chamber a supply of broken iron (or whatevermetal it is desired to melt) is fed through the door u above the metal-hopper D, and the supply of fuel and metal continued as it is required. In the SOI Ioo

' e will be closed and the damper e2 opened.

.ervoir rises above the point Z. rangement the melting is conducted with the But as soon as the metal begins to melt and run down into the chamber F it is very essential that all the flame and heat should pass through the throat a and down over the melted metal to keep it from cooling; hence as soon as the melting begins the damper e? must be closed and the damper e opened. Any ein: ders or other refuse that may be carried into the chamber F with the melted iron will be either burned up or carried off as gas or smoke, or iloat upon top of the metal andrun over into the trough G when the metal in the res- By this arexpenditure of a comparatively small amount of fuel, and the heat therefrom Vutilized not only to melt the metal in the first place in the chamber C, but also to keep it from cooling in the reservoir F by passing over it on its way to the sta-ck H. Another advantage by this arrangement is, that the melting may be continued indenitely by simply supplying the necessary fuel and metal to the hoppers E and D. If the coal runs out of the hopper E, and some metal still remains in the chamber() not quite melted, by turning on the blast by the nozzles g in the upper part of the coal-hopper,

the remaining met-al will be melted and run into Y, the chamber F and be drawn off,- and thus 4o prevent any metal remaining in the chamber.

I am aware that furnaces have been constructed with a fuel-hopper above the front of the melting-chamber, a metal-supply hopper above the rear of the melting-chamber, and

provided with blast-tuyeres, and a gatheringchamber below and connected with the melting-chamberby a narrow throat, and such I do not broadly claim.

i What I claim as new is l. A metal-melting furnace having a melting-chamber, C, provided with a dropdoor, K, in its bottom, a fuel-hopper, E, above 'the front of the melting-chamber, a metal-supply hopper, D, above the rear of the melting-chamber and adapted to discharge into said melting-chamber, blast nozzle or tuyere T T2, gathering-chamber F, connected to said melting-chamber by anarrow throat, a, and being below the level of said melting-chamber, and having its rear edge, b, lower than its front edge, c, and means, substantially as described, for removing the metal therefrom.

2. The combinationvof meltingfchamber C, fuel-hopper E, metal supply hopper D, blasttuyeres T and g, with blast-supply pipes T2 T3 T'l T", valve T, and dampers l1, and fi, substantially as and for the purpose set forth.

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

GEORGE MARK BRYANT. 

